Question 1006026
.
<pre>
|PF| = {{{18/2}}} = 9.

|CF| = 18 + 9 = 27.


Hint (instruction).

1. In any triangle, medians are concurrent, i.e. three medians have the common intersection.

2. The common intersection point divides each median in proportion 2:1 counting from the corresponding vertex. 

Regarding these properties, see the lesson <A HREF=http://www.algebra.com/algebra/homework/Triangles/Medians-of-a-triangle-are-concurrent.lesson>Medians of a triangle are concurrent</A> in this site.
</pre>